Welcome to the Santa Rita Experimental Range (SRER) website

Explore and enjoy over 100 years of accomplishments and contributions  of the longest continuously operating research area in the United States!

Learn more

The SRER is part of the Arizona Experiment Station system


In the event of an emergency please call 911.

For wildlife-related incidents please report to the Arizona Game and Fish Department, Region V at 520-628-5376.

For all other SRER related activities please contact the SRER main headquarters at 520-625-3243 or reach out to SRER Manager, Hector Elias at hectorej@arizona.edu.


Visiting the SRER and Using Facilities

The Santa Rita Experimental Range is a field station uniquely positioned to support research education, and outreach in the Southwest and offers unique opportunities for recreation. Visiting the SRER and Using Facilities provide all the information necessary for researchers and visitors to plan a visit.

SRER Rules and Regulations and Safety

Are you planning to visit the SRER? 
Take a minute and have a look at the SRER Rules of behavior and Safety tips to ensure you a pleasant time at the range and help us keep it clean and safe.

2023 RISE Symposium

The 19th annual Research Insights in Semiarid Ecosystems (RISE) Symposium was held on Saturday, 21 October 2023, on the University of Arizona campus. 
Read the full story at RISE Symposia and visit the RISE website to access the PDF version of the talks and posters.

Long-term Vegetation Transects

The Long term Vegetation Transects database provides access to long-term (from 10 to more than 70 years) records of vegetation measurements completed at 1 to 7-year intervals on over 200 permanent transects on the SRER.

M. McClaran taking repeat photography on the SRER in 2022

Repeat Photography

The Repeat Photography database provides access to the archive of photographs taken repeatedly over the years from the same 115 sites across the SRER. The earliest images were taken in 1902.

Cow and calf grazing on the SRER in August 2021

Grazing Management Plan

The current Livestock Grazing Management Plan on the Santa Rita Experimental Range from 01 November 2023 to 31 October 2024 is online!
All the previous grazing plans as well as all the information about the Livestock Grazing History on the SRER are available at Livestock Use.

Water and Carbon Exchange

Access the USDA-ARS Ecosystem-Atmosphere Water and Carbon Exchange database and graphs to know more about the exchanges of water vapor and carbon dioxide between the land and the atmosphere on the SRER.

NEON Tower Hut Landscape at the SRER

National Ecological Observatory Network

Learn more about the National Ecological Observatory Network (NEON) at the SRER and how to access NEON open data.

Centennial Conference 2003

The Proceedings from the Centennial Conference 2003 provide a complete overview of more than one century of publications about the SRER.

"The vast opportunities for future research at the Santa Rita Experimental Range are built on the rich legacy of a century of observation and research. In addition to opportunities, there are obligations to maintain and add to this legacy. Therefore, our future efforts should ensure a second century of research on the Santa Rita" 
(McClaran 2003)